66718448 has 20 divisors (see below), whose sum is σ = 133437888. Its totient is φ = 32282880.

The previous prime is 66718447. The next prime is 66718451. The reversal of 66718448 is 84481766.

66718448 is an admirable number.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 66718399 and 66718408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66718441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66761 + ... + 67752.

Almost surely, 2^66718448 is an apocalyptic number.

It is an amenable number.

66718448 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66718448 is a wasteful number, since it uses less digits than its factorization.

66718448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134552 (or 134546 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 66718448 is about 8168.1361399036. The cubic root of 66718448 is about 405.5850873792.

The spelling of 66718448 in words is "sixty-six million, seven hundred eighteen thousand, four hundred forty-eight".